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php判斷ip黑名單程序代碼實例

 這篇文章主要介紹了php判斷ip黑名單程序代碼實例,需要的朋友可以參考下

學校的新聞系統要求有些新聞只開放校內ip浏覽,於是重寫了一個代碼來實現此功能,實現後的結果是,只要把允許訪問的ip列入ip.txt這個文件中即可,同時支持c類ip,例如:   ip.txt 192.168 211.67.188 211.67.191.25 代碼如下:    代碼如下: /* * ip地址黑名單、白名單 * 判斷訪客地址的ip是否在ip.txt中,支持c類ip * By xhat */   $ip = $_SERVER['REMOTE_ADDR']; $ipArray = preg_replace("#rn?|n#","",file('ip.txt')); foreach ($ipArray as $ipTest) { if (substr_count($ip, $ipTest) != "0") { echo "ok"; //執行相關命令 die(); } }   ?>       上面大家可以使用代碼來騙過了,下面代碼進行升級  代碼如下: <?php  class block_ip {  var $Block_ip = array("192.168.1.1","210.10.2.1-20","222.34.4.*");  function __construct(){  }  function __destruct(){  }  private function makePregIP($str){  if (strstr($str,"-")) {  $aIP = explode(".",$str);  foreach ($aIP as $k=>$v) {  if (!strstr($v,"-")) {  $preg_limit .= makePregIP($v);  } else{  $aipNum = explode("-",$v);  for($i=$aipNum[0];$i<=$aipNum[1];$i++){  $preg .=$preg?"|".$i:"[".$i;  }  $preg_limit .=strrpos($preg_limit,".",1)==(strlen($preg_limit)-1)?$preg."]":".".$preg."]";  }  }  }else{  $preg_limit .= $str.".";  }  return $preg_limit;  }  private function getAllBlockIP(){  if ($this->Block_ip) {  foreach ($this->Block_ip as $k=>$v) {  $ipaddres = $this->makePregIP($v->start_ip);  $ip = str_ireplace(".",".",$ipaddres);  $ip = str_replace("*","[0-9]{1,3}",$ip);  $ipaddres = "/".$ip."/";  $ip_list[] = $ipaddres;  }  }  return $ip_list;  }  public function checkIP() {  $iptable = $this->getAllBlockIP();  $IsJoined = true;  //取得用戶ip  $Ip = $this->get_client_ip();  $Ip = trim($Ip);  //剔除黑名單中的IP區段  if ($iptable) {  foreach($iptable as $value) {  if (preg_match("{$value}",$Ip)) {  $IsJoined = false;  break;  }  }  }  // 如果在ip黑名單中就執行如下操作  if( !$IsJoined ){  echo "IP Error";  exit;  }  }  private function get_client_ip(){  if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))  $ip = getenv("HTTP_CLIENT_IP");  else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))  $ip = getenv("HTTP_X_FORWARDED_FOR");  else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))  $ip = getenv("REMOTE_ADDR");  else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))  $ip = $_SERVER['REMOTE_ADDR'];  else  $ip = "unknown";  return($ip);  }  }  ?>     引用片段:    代碼如下: $oBlock_ip = new block_ip();  $oBlock_ip->checkIP();  
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